Arizona Diamondbacks No. 3 prospect and outfielder Slade Caldwell has been in the midst of a tough season thus far with the High-A Hillsboro Hops . His numbers have been rough, and he had yet to homer at the High-A level. All of that began to shift Friday night, in one unbelievable performance. Diamondbacks prospect Slade Caldwell has insane game Jul 12, 2025; Atlanta, GA, USA; National League outfielder Slade Caldwell (5) of the Arizona Diamondbacks makes a save during the seventh inning against American League at Truist Park. Mandatory Credit: Brett Davis-Imagn Images | Brett Davis-Imagn Images Caldwell, who was Arizona's first-round selection in the 2024 MLB Draft, was hitting just .194 heading into Thursday night's game, and slugging a mere .252. He had been struggling at the plate, both in terms of simply finding base hits, and with regard to his lack of power output. Part of that may have been due to a back issue — a herniated disc that arose in late 2025 and nagged through 2026 spring training.…